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arXiv 0909.1404hep-phnucl-th
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不同夸克模型下的Boer-Mulders函数分析

Analyzing the Boer-Mulders function within different quark models

A. Courtoy, S. Scopetta, V. Vento

摘要:

一个一般的形式主义的时间反演奇部分子分布的评价在这里应用到计算布尔-Mulders函数。同样的形式主义时,适用于评估西弗斯功能导致的结果,履行Burkardt总和规则相当不错。本文计算了两种不同的质子结构模型:组分夸克模型和MIT袋模型。在后一种情况下,重要的差异被发现相对于以前的评价在同一个框架中,一个功能已经遇到的计算中的Sivers功能。所获得的结果与目前的智慧是一致的,即,$u$和$d$特征的贡献结果具有相同的符号,遵循分析依赖于碰撞参量的广义部分子分布的模型无关特征所建议的模式。因此,证实了本方法是适合于时间反演奇分布函数的分析。两个模型的结果之间的关键比较,以及之间的计算结果的Sivers和布尔-Mulders功能,也进行了。

英文摘要:

A general formalism for the evaluation of time reversal odd parton distributions is applied here to calculate the Boer-Mulders function. The same formalism when applied to evaluate the Sivers function led to results which fulfill the Burkardt sum rule quite well. The calculation here has been performed for two different models of proton structure: a constituent quark model and the MIT bag model. In the latter case, important differences are found with respect to a previous evaluation in the same framework, a feature already encountered in the calculation of the Sivers function. The results obtained are consistent with the present wisdom, i.e., the contributions for the $u$ and $d$ flavors turn out to have the same sign, following the pattern suggested analyzing the model independent features of the impact parameter dependent generalized parton distributions. It is therefore confirmed that the present approach is suitable for the analysis of time reversal odd distribution functions. A critical comparison between the outcomes of the two models, as well as between the results of the calculations for the Sivers and Boer-Mulders functions, is also carried out.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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